Southern California -- this just in

Authorities are saying that a push sent an 84-year-old woman to her death after she fell onto the tracks at the Metro station in Little Tokyo.

[Corrected at 1:33 p.m.: Coroner's officials initially reported that the woman was 86. She was 84.]

Betty Sugiyama was standing on the platform at the Gold Line station on Sunday morning when another woman pushed her off, police said. Detectives said witnesses reported that Sugiyama did not provoke the attack.

Jackkqueline Pogue, 44, was arrested on the platform soon after, and is expected to be charged with murder, according to the Los Angeles County Sheriff's Department.

A motive was unclear Monday afternoon, as homicide detectives continued their investigation.

After the incident, Sugiyama was taken to a nearby hospital, where she died Sunday night. Assistant chief coroner Ed Winter said it appeared she was not struck by a train.